Create rooms within existing square footage, look into ADU properties, etc. 

An LLC by itself does not change anything for taxes.

I know a lot of CA investors doing MTR/STRs to cash flow in-state and OOS but it's a lot more work, not mailbox money.I hear stories of OOS investors losing money in the Midwest, the worst being a CA investor buying 3 apartment Class C complexes in Missouri who finally sold it 3 years year with all the repairs and tenant issues after changing PMs which didn't help.

Always validate what you read online, things change, I could be wrong, but use this as a starting point in your research.What Is an ADU?

Some developers go above and beyond on kitchen appliances and install a package that may make sense in a $1.5M+ house in a $900k house but short change all other areas of the rehab.

Still, I managed to lock it in for $145,000 by emphasizing how much TLC (and cash) it needed to bring it back to life.

Does adding a ADU create value in a property vs. the price of the adu build? 

Then laws changed and SSN's became our IDs and we could no longer typically ask for them in my area as a landlord.

I’m not suggesting a person change their business model entirely, but usually a person either deletes something or adds something in order for a different outcome or at least a more modified outcome.What’s your thoughts?

The fact that you think the tenant is a pain has nothing to do with how you maintain the property, you could be creating legal and maintenance problems for yourself by not taking action.